<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux.git/rust/kernel/io, branch v7.2-rc1</title>
<subtitle>Linux kernel source tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/'/>
<entry>
<title>Merge tag 'driver-core-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core</title>
<updated>2026-06-15T07:11:17+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2026-06-15T07:11:17+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=36808d5e983985bbda87e01059cccc071fe3ec8d'/>
<id>36808d5e983985bbda87e01059cccc071fe3ec8d</id>
<content type='text'>
Pull driver core updates from Danilo Krummrich:
 "Deferred probe:
   - Fix race where deferred probe timeout work could be permanently
     canceled by using mod_delayed_work()
   - Fix missing jiffies conversion in deferred_probe_extend_timeout()
   - Guard timeout extension with delayed_work_pending() to prevent
     premature firing
   - Use system_percpu_wq instead of the deprecated system_wq
   - Update deferred_probe_timeout documentation

  device:
   - Replace direct struct device bitfield access (can_match, dma_iommu,
     dma_skip_sync, dma_ops_bypass, state_synced, dma_coherent,
     of_node_reused, offline, offline_disabled) with flag-based
     accessors using bit operations
   - Reject devices with unregistered buses
   - Delete unused DEVICE_ATTR_PREALLOC()
   - Add low-level device attribute macros with const show/store
     callbacks, allowing device attributes to reside in read-only memory
   - Move core device attributes to read-only memory
   - Constify group array pointers in driver_add_groups() /
     driver_remove_groups(), struct bus_type, and struct device_driver

  device property:
   - Fix fwnode reference leak in fwnode_graph_get_endpoint_by_id()
   - Initialize all fields of fwnode_handle in fwnode_init()
   - Provide swnode_get()/swnode_put() wrappers around kobject_get/put()
   - Allow passing struct software_node_ref_args pointers directly to
     PROPERTY_ENTRY_REF()

  driver_override:
   - Migrate amba, cdx, vmbus, and rpmsg to the generic driver_override
     infrastructure, fixing a UAF from unsynchronized access to
     driver_override in bus match() callbacks
   - Remove the now-unused driver_set_override()

  firmware loader:
   - Fix recursive lock deadlock in device_cache_fw_images() when async
     work falls back to synchronous execution
   - Fix device reference leak in firmware_upload_register()

  platform:
   - Pass KBUILD_MODNAME through the platform driver registration macro
     to create module symlinks in sysfs for built-in drivers; move
     module_kset initialization to a pure_initcall and tegra cbb
     registration to core_initcall to ensure correct ordering
   - Pass THIS_MODULE implicitly through a coresight_init_driver() macro

  sysfs:
   - Upgrade OOB write detection in sysfs_kf_seq_show() from printk to
     WARN
   - Add return value clamping to sysfs_kf_read()

  Rust:
   - ACPI:

     Fix missing match data for PRP0001 by exporting
     acpi_of_match_device()

   - Auxiliary:

     Replace drvdata() with dedicated registration data on
     auxiliary_device. drvdata() exposed the driver's bus device private
     data beyond the driver's own scope, creating ordering constraints
     and forcing the data to outlive all registrations that access it.
     Registration data is instead scoped structurally to the
     Registration object, making lifecycle ordering enforced by
     construction rather than convention.

   - Rust-native device driver lifetimes (HRT):

     Allow Rust device drivers to carry a lifetime parameter on their
     bus device private data, tied to the device binding scope -- the
     interval during which a bus device is bound to a driver. Device
     resources like pci::Bar&lt;'a&gt; and IoMem&lt;'a&gt; can be stored directly in
     the driver's bus device private data with a lifetime bounded by the
     binding scope, so the compiler enforces at build time that they do
     not outlive the binding. This removes Devres indirection from every
     access site and eliminates try_access() failure paths in
     destructors.

     Bus driver traits use a Generic Associated Type (GAT) Data&lt;'bound&gt;
     to introduce the lifetime on the private data, rather than
     parameterizing the Driver trait itself. Auxiliary registration
     data, where the lifetime is not introduced by a trait callback but
     must be threaded through Registration, uses the ForLt trait (a
     type-level abstraction for types generic over a lifetime).

  Misc:
   - Fix DT overlayed devices not probing by reverting the broken
     treewide overlay fix and re-running fw_devlink consumer pickup when
     an overlay is applied to a bound device
   - Use root_device_register() for faux bus root device; add sanity
     check for failed bus init
   - Fix dev_has_sync_state() data race with READ_ONCE() and move it to
     base.h
   - Avoid spurious device_links warning when removing a device while
     its supplier is unbinding
   - Switch ISA bus to dynamic root device
   - Fix suspicious RCU usage in kernfs_put()
   - Remove devcoredump exit callback
   - Constify devfreq_event_class"

* tag 'driver-core-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core: (81 commits)
  software node: allow passing reference args to PROPERTY_ENTRY_REF()
  driver core: platform: set mod_name in driver registration
  coresight: pass THIS_MODULE implicitly through a macro
  kernel: param: initialize module_kset in a pure_initcall
  soc/tegra: cbb: Move driver registration from pure_initcall to core_initcall
  firmware_loader: Fix recursive lock in device_cache_fw_images()
  driver core: Use system_percpu_wq instead of system_wq
  driver core: remove driver_set_override()
  rpmsg: use generic driver_override infrastructure
  Drivers: hv: vmbus: use generic driver_override infrastructure
  cdx: use generic driver_override infrastructure
  amba: use generic driver_override infrastructure
  rust: devres: add 'static bound to Devres&lt;T&gt;
  samples: rust: rust_driver_auxiliary: showcase lifetime-bound registration data
  rust: auxiliary: generalize Registration over ForLt
  rust: types: add `ForLt` trait for higher-ranked lifetime support
  gpu: nova-core: separate driver type from driver data
  samples: rust: rust_driver_pci: use HRT lifetime for Bar
  rust: io: make IoMem and ExclusiveIoMem lifetime-parameterized
  rust: pci: make Bar lifetime-parameterized
  ...
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull driver core updates from Danilo Krummrich:
 "Deferred probe:
   - Fix race where deferred probe timeout work could be permanently
     canceled by using mod_delayed_work()
   - Fix missing jiffies conversion in deferred_probe_extend_timeout()
   - Guard timeout extension with delayed_work_pending() to prevent
     premature firing
   - Use system_percpu_wq instead of the deprecated system_wq
   - Update deferred_probe_timeout documentation

  device:
   - Replace direct struct device bitfield access (can_match, dma_iommu,
     dma_skip_sync, dma_ops_bypass, state_synced, dma_coherent,
     of_node_reused, offline, offline_disabled) with flag-based
     accessors using bit operations
   - Reject devices with unregistered buses
   - Delete unused DEVICE_ATTR_PREALLOC()
   - Add low-level device attribute macros with const show/store
     callbacks, allowing device attributes to reside in read-only memory
   - Move core device attributes to read-only memory
   - Constify group array pointers in driver_add_groups() /
     driver_remove_groups(), struct bus_type, and struct device_driver

  device property:
   - Fix fwnode reference leak in fwnode_graph_get_endpoint_by_id()
   - Initialize all fields of fwnode_handle in fwnode_init()
   - Provide swnode_get()/swnode_put() wrappers around kobject_get/put()
   - Allow passing struct software_node_ref_args pointers directly to
     PROPERTY_ENTRY_REF()

  driver_override:
   - Migrate amba, cdx, vmbus, and rpmsg to the generic driver_override
     infrastructure, fixing a UAF from unsynchronized access to
     driver_override in bus match() callbacks
   - Remove the now-unused driver_set_override()

  firmware loader:
   - Fix recursive lock deadlock in device_cache_fw_images() when async
     work falls back to synchronous execution
   - Fix device reference leak in firmware_upload_register()

  platform:
   - Pass KBUILD_MODNAME through the platform driver registration macro
     to create module symlinks in sysfs for built-in drivers; move
     module_kset initialization to a pure_initcall and tegra cbb
     registration to core_initcall to ensure correct ordering
   - Pass THIS_MODULE implicitly through a coresight_init_driver() macro

  sysfs:
   - Upgrade OOB write detection in sysfs_kf_seq_show() from printk to
     WARN
   - Add return value clamping to sysfs_kf_read()

  Rust:
   - ACPI:

     Fix missing match data for PRP0001 by exporting
     acpi_of_match_device()

   - Auxiliary:

     Replace drvdata() with dedicated registration data on
     auxiliary_device. drvdata() exposed the driver's bus device private
     data beyond the driver's own scope, creating ordering constraints
     and forcing the data to outlive all registrations that access it.
     Registration data is instead scoped structurally to the
     Registration object, making lifecycle ordering enforced by
     construction rather than convention.

   - Rust-native device driver lifetimes (HRT):

     Allow Rust device drivers to carry a lifetime parameter on their
     bus device private data, tied to the device binding scope -- the
     interval during which a bus device is bound to a driver. Device
     resources like pci::Bar&lt;'a&gt; and IoMem&lt;'a&gt; can be stored directly in
     the driver's bus device private data with a lifetime bounded by the
     binding scope, so the compiler enforces at build time that they do
     not outlive the binding. This removes Devres indirection from every
     access site and eliminates try_access() failure paths in
     destructors.

     Bus driver traits use a Generic Associated Type (GAT) Data&lt;'bound&gt;
     to introduce the lifetime on the private data, rather than
     parameterizing the Driver trait itself. Auxiliary registration
     data, where the lifetime is not introduced by a trait callback but
     must be threaded through Registration, uses the ForLt trait (a
     type-level abstraction for types generic over a lifetime).

  Misc:
   - Fix DT overlayed devices not probing by reverting the broken
     treewide overlay fix and re-running fw_devlink consumer pickup when
     an overlay is applied to a bound device
   - Use root_device_register() for faux bus root device; add sanity
     check for failed bus init
   - Fix dev_has_sync_state() data race with READ_ONCE() and move it to
     base.h
   - Avoid spurious device_links warning when removing a device while
     its supplier is unbinding
   - Switch ISA bus to dynamic root device
   - Fix suspicious RCU usage in kernfs_put()
   - Remove devcoredump exit callback
   - Constify devfreq_event_class"

* tag 'driver-core-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core: (81 commits)
  software node: allow passing reference args to PROPERTY_ENTRY_REF()
  driver core: platform: set mod_name in driver registration
  coresight: pass THIS_MODULE implicitly through a macro
  kernel: param: initialize module_kset in a pure_initcall
  soc/tegra: cbb: Move driver registration from pure_initcall to core_initcall
  firmware_loader: Fix recursive lock in device_cache_fw_images()
  driver core: Use system_percpu_wq instead of system_wq
  driver core: remove driver_set_override()
  rpmsg: use generic driver_override infrastructure
  Drivers: hv: vmbus: use generic driver_override infrastructure
  cdx: use generic driver_override infrastructure
  amba: use generic driver_override infrastructure
  rust: devres: add 'static bound to Devres&lt;T&gt;
  samples: rust: rust_driver_auxiliary: showcase lifetime-bound registration data
  rust: auxiliary: generalize Registration over ForLt
  rust: types: add `ForLt` trait for higher-ranked lifetime support
  gpu: nova-core: separate driver type from driver data
  samples: rust: rust_driver_pci: use HRT lifetime for Bar
  rust: io: make IoMem and ExclusiveIoMem lifetime-parameterized
  rust: pci: make Bar lifetime-parameterized
  ...
</pre>
</div>
</content>
</entry>
<entry>
<title>rust: make `build_assert` module the home of related macros</title>
<updated>2026-06-10T07:07:13+00:00</updated>
<author>
<name>Gary Guo</name>
<email>gary@garyguo.net</email>
</author>
<published>2026-06-09T14:26:33+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=8d49d90fb9f0fd5a0355b4b705395c9ba833415b'/>
<id>8d49d90fb9f0fd5a0355b4b705395c9ba833415b</id>
<content type='text'>
Given the macro scoping rules, all macros are rendered twice, in the
module and in the top-level of kernel crate.

Add `#[doc(hidden)]` to the macro definition and `#[doc(inline)]` to the
re-export inside `build_assert` module so the top-level items are hidden.

[ Sadly, because the definition is hidden, `rustdoc` decides to not list
  them as re-exports in the `prelude` page anymore, even if we refer to
  the not-actually-hidden item.

    - Miguel ]

Acked-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
Reviewed-by: Alice Ryhl &lt;aliceryhl@google.com&gt;
Acked-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Acked-by: FUJITA Tomonori &lt;fujita.tomonori@gmail.com&gt;
Acked-by: Boqun Feng &lt;boqun@kernel.org&gt;
Signed-off-by: Gary Guo &lt;gary@garyguo.net&gt;
Link: https://patch.msgid.link/20260609142637.373347-1-gary@kernel.org
[ Kept a single declaration in the prelude, and reworded since they
  already had `no_inline`. Removed other imports from `predefine` since
  we now use the prelude. - Miguel ]
Signed-off-by: Miguel Ojeda &lt;ojeda@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Given the macro scoping rules, all macros are rendered twice, in the
module and in the top-level of kernel crate.

Add `#[doc(hidden)]` to the macro definition and `#[doc(inline)]` to the
re-export inside `build_assert` module so the top-level items are hidden.

[ Sadly, because the definition is hidden, `rustdoc` decides to not list
  them as re-exports in the `prelude` page anymore, even if we refer to
  the not-actually-hidden item.

    - Miguel ]

Acked-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
Reviewed-by: Alice Ryhl &lt;aliceryhl@google.com&gt;
Acked-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Acked-by: FUJITA Tomonori &lt;fujita.tomonori@gmail.com&gt;
Acked-by: Boqun Feng &lt;boqun@kernel.org&gt;
Signed-off-by: Gary Guo &lt;gary@garyguo.net&gt;
Link: https://patch.msgid.link/20260609142637.373347-1-gary@kernel.org
[ Kept a single declaration in the prelude, and reworded since they
  already had `no_inline`. Removed other imports from `predefine` since
  we now use the prelude. - Miguel ]
Signed-off-by: Miguel Ojeda &lt;ojeda@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>rust: io: use the `bitfield!` macro in `register!`</title>
<updated>2026-06-09T02:13:16+00:00</updated>
<author>
<name>Alexandre Courbot</name>
<email>acourbot@nvidia.com</email>
</author>
<published>2026-06-06T12:43:06+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=01504bc3b7d1ffc1f05ad507ebdc5400e45e9a4d'/>
<id>01504bc3b7d1ffc1f05ad507ebdc5400e45e9a4d</id>
<content type='text'>
Replace the local bitfield rules by the equivalent invocation of the
`bitfield!` macro.

No functional change should be introduced as the `bitfield!` macro has
been extracted from the rules of `register!`.

Acked-by: Yury Norov &lt;yury.norov@gmail.com&gt;
Acked-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
Signed-off-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Yury Norov &lt;ynorov@nvidia.com&gt;
Link: https://patch.msgid.link/20260606-bitfield-v5-3-b92188820914@nvidia.com
Signed-off-by: Miguel Ojeda &lt;ojeda@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Replace the local bitfield rules by the equivalent invocation of the
`bitfield!` macro.

No functional change should be introduced as the `bitfield!` macro has
been extracted from the rules of `register!`.

Acked-by: Yury Norov &lt;yury.norov@gmail.com&gt;
Acked-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
Signed-off-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Yury Norov &lt;ynorov@nvidia.com&gt;
Link: https://patch.msgid.link/20260606-bitfield-v5-3-b92188820914@nvidia.com
Signed-off-by: Miguel Ojeda &lt;ojeda@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>rust: io: make IoMem and ExclusiveIoMem lifetime-parameterized</title>
<updated>2026-05-27T14:24:28+00:00</updated>
<author>
<name>Danilo Krummrich</name>
<email>dakr@kernel.org</email>
</author>
<published>2026-05-25T20:21:06+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=89f55d04c6028fa15800a4887faf51bdeebfa431'/>
<id>89f55d04c6028fa15800a4887faf51bdeebfa431</id>
<content type='text'>
Add a lifetime parameter to IoMem&lt;'a, SIZE&gt; and ExclusiveIoMem&lt;'a,
SIZE&gt;, storing a &amp;'a Device&lt;Bound&gt; reference to tie the mapping to the
device's lifetime.

This mirrors the pci::Bar&lt;'a, SIZE&gt; design and enables drivers to hold
I/O memory mappings directly in their HRT private data, tied to the
device lifetime.

IoRequest::iomap_* methods now return the mapping directly instead of
wrapping it in Devres. Callers that need device-managed revocation can
call the new into_devres() method.

Acked-by: Uwe Kleine-König &lt;ukleinek@kernel.org&gt;
Reviewed-by: Eliot Courtney &lt;ecourtney@nvidia.com&gt;
Reviewed-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Reviewed-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Gary Guo &lt;gary@garyguo.net&gt;
Link: https://patch.msgid.link/20260525202921.124698-20-dakr@kernel.org
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Add a lifetime parameter to IoMem&lt;'a, SIZE&gt; and ExclusiveIoMem&lt;'a,
SIZE&gt;, storing a &amp;'a Device&lt;Bound&gt; reference to tie the mapping to the
device's lifetime.

This mirrors the pci::Bar&lt;'a, SIZE&gt; design and enables drivers to hold
I/O memory mappings directly in their HRT private data, tied to the
device lifetime.

IoRequest::iomap_* methods now return the mapping directly instead of
wrapping it in Devres. Callers that need device-managed revocation can
call the new into_devres() method.

Acked-by: Uwe Kleine-König &lt;ukleinek@kernel.org&gt;
Reviewed-by: Eliot Courtney &lt;ecourtney@nvidia.com&gt;
Reviewed-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Reviewed-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Gary Guo &lt;gary@garyguo.net&gt;
Link: https://patch.msgid.link/20260525202921.124698-20-dakr@kernel.org
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>rust: platform: make Driver trait lifetime-parameterized</title>
<updated>2026-05-27T14:23:31+00:00</updated>
<author>
<name>Danilo Krummrich</name>
<email>dakr@kernel.org</email>
</author>
<published>2026-05-25T20:21:00+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=81fdc788144348f295cfaa4b1e1edf6c74441c15'/>
<id>81fdc788144348f295cfaa4b1e1edf6c74441c15</id>
<content type='text'>
Add a 'bound lifetime to the associated Data, changing type Data to type
Data&lt;'bound&gt;.

This allows the driver's bus device private data to capture the device /
driver bound lifetime; device resources can be stored directly by
reference rather than requiring Devres.

The probe() and unbind() callbacks thus gain a 'bound lifetime parameter
on the methods themselves; avoiding a global lifetime on the trait impl.

Existing drivers set type Data&lt;'bound&gt; = Self, preserving the current
behavior.

Acked-by: Uwe Kleine-König &lt;ukleinek@kernel.org&gt;
Reviewed-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Reviewed-by: Gary Guo &lt;gary@garyguo.net&gt;
Link: https://patch.msgid.link/20260525202921.124698-14-dakr@kernel.org
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Add a 'bound lifetime to the associated Data, changing type Data to type
Data&lt;'bound&gt;.

This allows the driver's bus device private data to capture the device /
driver bound lifetime; device resources can be stored directly by
reference rather than requiring Devres.

The probe() and unbind() callbacks thus gain a 'bound lifetime parameter
on the methods themselves; avoiding a global lifetime on the trait impl.

Existing drivers set type Data&lt;'bound&gt; = Self, preserving the current
behavior.

Acked-by: Uwe Kleine-König &lt;ukleinek@kernel.org&gt;
Reviewed-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Reviewed-by: Gary Guo &lt;gary@garyguo.net&gt;
Link: https://patch.msgid.link/20260525202921.124698-14-dakr@kernel.org
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>rust: device: make Core and CoreInternal lifetime-parameterized</title>
<updated>2026-05-27T14:22:42+00:00</updated>
<author>
<name>Danilo Krummrich</name>
<email>dakr@kernel.org</email>
</author>
<published>2026-05-25T20:20:58+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=24799831d631239ff21ea1bf7feee832df48b81f'/>
<id>24799831d631239ff21ea1bf7feee832df48b81f</id>
<content type='text'>
Device&lt;Core&gt; references in probe callbacks are scoped to the callback,
not the full binding duration. Add a lifetime parameter to Core and
CoreInternal to accurately represent this in the type system.

Suggested-by: Gary Guo &lt;gary@garyguo.net&gt;
Reviewed-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Reviewed-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Eliot Courtney &lt;ecourtney@nvidia.com&gt;
Reviewed-by: Gary Guo &lt;gary@garyguo.net&gt;
Link: https://patch.msgid.link/20260525202921.124698-12-dakr@kernel.org
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Device&lt;Core&gt; references in probe callbacks are scoped to the callback,
not the full binding duration. Add a lifetime parameter to Core and
CoreInternal to accurately represent this in the type system.

Suggested-by: Gary Guo &lt;gary@garyguo.net&gt;
Reviewed-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Reviewed-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Eliot Courtney &lt;ecourtney@nvidia.com&gt;
Reviewed-by: Gary Guo &lt;gary@garyguo.net&gt;
Link: https://patch.msgid.link/20260525202921.124698-12-dakr@kernel.org
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>rust: driver: decouple driver private data from driver type</title>
<updated>2026-05-27T14:22:41+00:00</updated>
<author>
<name>Danilo Krummrich</name>
<email>dakr@kernel.org</email>
</author>
<published>2026-05-25T20:20:51+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=7fdffdda630ee61ae0e09ef8f1ace52bbf70e2b0'/>
<id>7fdffdda630ee61ae0e09ef8f1ace52bbf70e2b0</id>
<content type='text'>
Add a type Data&lt;'bound&gt; associated type to all bus driver traits,
decoupling the driver's bus device private data type from the driver
struct itself.

In the context of adding a 'bound lifetime, making this an associated
type has the advantage that it allows us to avoid a driver trait global
lifetime and it avoids the need for ForLt for bus device private data;
both of which make the subsequent implementation by buses much simpler.

All existing drivers and doc examples set type Data = Self to preserve
the current behavior.

Reviewed-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Gary Guo &lt;gary@garyguo.net&gt;
Reviewed-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Link: https://patch.msgid.link/20260525202921.124698-5-dakr@kernel.org
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Add a type Data&lt;'bound&gt; associated type to all bus driver traits,
decoupling the driver's bus device private data type from the driver
struct itself.

In the context of adding a 'bound lifetime, making this an associated
type has the advantage that it allows us to avoid a driver trait global
lifetime and it avoids the need for ForLt for bus device private data;
both of which make the subsequent implementation by buses much simpler.

All existing drivers and doc examples set type Data = Self to preserve
the current behavior.

Reviewed-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Gary Guo &lt;gary@garyguo.net&gt;
Reviewed-by: Greg Kroah-Hartman &lt;gregkh@linuxfoundation.org&gt;
Link: https://patch.msgid.link/20260525202921.124698-5-dakr@kernel.org
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>rust: io: introduce `write_reg` and `LocatedRegister`</title>
<updated>2026-03-17T19:04:11+00:00</updated>
<author>
<name>Alexandre Courbot</name>
<email>acourbot@nvidia.com</email>
</author>
<published>2026-03-14T01:06:18+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=9a52a8f5ed97d47c9641248874f4c6a78e136d97'/>
<id>9a52a8f5ed97d47c9641248874f4c6a78e136d97</id>
<content type='text'>
Some I/O types, like fixed address registers, carry their location
alongside their values. For these types, the regular `Io::write` method
can lead into repeating the location information twice: once to provide
the location itself, another time to build the value.

We are also considering supporting making all register values carry
their full location information for convenience and safety.

Add a new `Io::write_reg` method that takes a single argument
implementing `LocatedRegister`, a trait that decomposes implementors
into a `(location, value)` tuple. This allows write operations on fixed
offset registers to be done while specifying their name only once.

Suggested-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
Link: https://lore.kernel.org/all/DH0XBLXZD81K.22SWIZ1ZAOW1@kernel.org/
Signed-off-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Link: https://patch.msgid.link/20260314-register-v9-8-86805b2f7e9d@nvidia.com
[ Replace FIFO with VERSION register in the examples. - Danilo ]
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Some I/O types, like fixed address registers, carry their location
alongside their values. For these types, the regular `Io::write` method
can lead into repeating the location information twice: once to provide
the location itself, another time to build the value.

We are also considering supporting making all register values carry
their full location information for convenience and safety.

Add a new `Io::write_reg` method that takes a single argument
implementing `LocatedRegister`, a trait that decomposes implementors
into a `(location, value)` tuple. This allows write operations on fixed
offset registers to be done while specifying their name only once.

Suggested-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
Link: https://lore.kernel.org/all/DH0XBLXZD81K.22SWIZ1ZAOW1@kernel.org/
Signed-off-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Link: https://patch.msgid.link/20260314-register-v9-8-86805b2f7e9d@nvidia.com
[ Replace FIFO with VERSION register in the examples. - Danilo ]
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>rust: io: add `register!` macro</title>
<updated>2026-03-17T19:04:11+00:00</updated>
<author>
<name>Alexandre Courbot</name>
<email>acourbot@nvidia.com</email>
</author>
<published>2026-03-14T01:06:17+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=20ba6a1dbcb957152f6d858015b3a3311dd6da49'/>
<id>20ba6a1dbcb957152f6d858015b3a3311dd6da49</id>
<content type='text'>
Add a macro for defining hardware register types with I/O accessors.

Each register field is represented as a `Bounded` of the appropriate bit
width, ensuring field values are never silently truncated.

Fields can optionally be converted to/from custom types, either fallibly
or infallibly.

The address of registers can be direct, relative, or indexed, supporting
most of the patterns in which registers are arranged.

Suggested-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
Link: https://lore.kernel.org/all/20250306222336.23482-6-dakr@kernel.org/
Co-developed-by: Gary Guo &lt;gary@garyguo.net&gt;
Signed-off-by: Gary Guo &lt;gary@garyguo.net&gt;
Signed-off-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Link: https://patch.msgid.link/20260314-register-v9-7-86805b2f7e9d@nvidia.com
[ * Improve wording and formatting of doc-comments,
  * Import build_assert!(),
  * Add missing inline annotations,
  * Call static_assert!() with absolute path,
  * Use expect instead of allow.

    - Danilo ]
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Add a macro for defining hardware register types with I/O accessors.

Each register field is represented as a `Bounded` of the appropriate bit
width, ensuring field values are never silently truncated.

Fields can optionally be converted to/from custom types, either fallibly
or infallibly.

The address of registers can be direct, relative, or indexed, supporting
most of the patterns in which registers are arranged.

Suggested-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
Link: https://lore.kernel.org/all/20250306222336.23482-6-dakr@kernel.org/
Co-developed-by: Gary Guo &lt;gary@garyguo.net&gt;
Signed-off-by: Gary Guo &lt;gary@garyguo.net&gt;
Signed-off-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Link: https://patch.msgid.link/20260314-register-v9-7-86805b2f7e9d@nvidia.com
[ * Improve wording and formatting of doc-comments,
  * Import build_assert!(),
  * Add missing inline annotations,
  * Call static_assert!() with absolute path,
  * Use expect instead of allow.

    - Danilo ]
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>rust: io: mem: use non-relaxed I/O ops in examples</title>
<updated>2026-03-17T19:02:09+00:00</updated>
<author>
<name>Alexandre Courbot</name>
<email>acourbot@nvidia.com</email>
</author>
<published>2026-02-06T06:00:16+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=19103d4f93673c804ef82dd797cd2b935d0bf70f'/>
<id>19103d4f93673c804ef82dd797cd2b935d0bf70f</id>
<content type='text'>
The `_relaxed` I/O variant methods are about to be replaced by a wrapper
type exposing this access pattern with the regular methods of the `Io`
trait. Thus replace the examples to use the regular I/O methods.

Since these are examples, we want them to use the most standard ops
anyway, and the relaxed variants were but an addition that was
MMIO-specific.

Reviewed-by: Daniel Almeida &lt;daniel.almeida@collabora.com&gt;
Acked-by: Alice Ryhl &lt;aliceryhl@google.com&gt;
Signed-off-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Gary Guo &lt;gary@garyguo.net&gt;
Link: https://patch.msgid.link/20260206-io-v2-2-71dea20a06e6@nvidia.com
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The `_relaxed` I/O variant methods are about to be replaced by a wrapper
type exposing this access pattern with the regular methods of the `Io`
trait. Thus replace the examples to use the regular I/O methods.

Since these are examples, we want them to use the most standard ops
anyway, and the relaxed variants were but an addition that was
MMIO-specific.

Reviewed-by: Daniel Almeida &lt;daniel.almeida@collabora.com&gt;
Acked-by: Alice Ryhl &lt;aliceryhl@google.com&gt;
Signed-off-by: Alexandre Courbot &lt;acourbot@nvidia.com&gt;
Reviewed-by: Gary Guo &lt;gary@garyguo.net&gt;
Link: https://patch.msgid.link/20260206-io-v2-2-71dea20a06e6@nvidia.com
Signed-off-by: Danilo Krummrich &lt;dakr@kernel.org&gt;
</pre>
</div>
</content>
</entry>
</feed>
